DS3161 datasheet(45/384 Pages) MAXIM

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DS3161/DS3162/DS3163/DS3164

TYPE

FUNCTION

TNEGn /

TOHMOn

Transmit Negative AMI / Line OH Mask

TNEGn: When the port line is configured for B3ZS, HDB3 or AMI mode and the

framer is not configured for one of the “-OHM” modes (see Table 10-30), a high on

this pin indicates that a negative pulse should be transmitted on the line. The signal is

updated on the positive clock edge of the referenced clock pin if the clock pin signal is

not inverted, otherwise it is updated on the falling edge of the clock. The signal is

typically referenced to the TLCLKn line clock output pins, but it can be referenced to

the TCLKOn, TCLKIn, RLCLKn or RCLKOn pins.

This output signal can be inverted.

DS3: 44.736 Mbps +20ppm

E3: 34.368 Mbps +20ppm

CC52: 52 Mbps +20ppm

TOHMOn: When the framer is configured for one of the “-OHM” modes (see Table

10-30), the transmit overhead mask signal is output on this pin. This signal is a

delayed version of TOHMIn or ROHMIn when in local loopback (three clock period

delay). This signal will be high to indicate that the data on TDATn is not valid data

and can be overwritten by external logic to add an external frame signal. This signal

will be low to indicate that the data on TDATn is valid. The signal is updated on the

positive clock edge of the referenced clock pin if the clock pin signal is not inverted,

otherwise it is updated on the falling edge of the clock. The signal is typically

referenced to the TLCLKn line clock output pins, but it can be referenced to the

TCLKOn, TCLKIn, RLCLKn or RCLKOn pins.

This output signal can be inverted.

RLCLKn

Receive Line Clock Input

RLCLKn: This clock is typically used for the reference clock for the RPOSn / RDATn,

RNEGn / RLCVn / ROHMIn signals but can also be used as the reference clock for

the RSERn, RSOFOn / RDENn / RFOHENOn, RFOHENIn, TOHMIn / TSOFIn,

TFOHn / TSERn, TFOHENIn, TSOFOn / TDENn / TFOHENOn, TPOSn / TDATn and

TNEGn / TOHMOn signals.

This input signal can be inverted.

DS3: 44.736 MHz +20 ppm

E3: 34.368 MHz +20 ppm

CC52: 52 MHz +20 ppm

RPOSn /

RDATn

Iad

Receive Positive AMI / Data

RPOSn: When the port line is configured for B3ZS, HDB3 or AMI mode and the

framer is not configured for one of the “-OHM” modes, a high on this pin indicates that

a positive pulse has been detected using an external LIU. The signal is sampled on

the positive clock edge of the referenced clock pin if the clock pin signal is not

inverted, otherwise it is sampled on the falling edge of the clock. The signal is typically

referenced to the RLCLKn line clock input pins, but it can be referenced to the

RCLKOn output pins.

This input signal can be inverted.

RDATn: When the port line interface is configured for UNI mode or the framer is

configured for one of the “-OHM” modes, the un-encoded receive signal is input on

this pin. The signal is sampled on the positive clock edge of the referenced clock pin if

the clock pin signal is not inverted, otherwise it is sampled on the falling edge of the

clock. The signal is typically referenced to the RLCLKn line clock input pins, but it can

be referenced to the RCLKOn output pins.

This input signal can be inverted.

DS3: 44.736 Mbps +20ppm

E3: 34.368 Mbps +20ppm

CC52: 52 Mbps +20ppm

RNEGn /

RLCVn /

ROHMIn

Iad

Receive Negative AMI / Line Code Violation / Line OH Mask input

RNEGn: When the port line is configured for B3ZS, HDB3 or AMI mode and the

framer is not configured for one of the “-OHM” modes, a high on this pin indicates that

a negative pulse has been detected using an external LIU. The signal is sampled on

DS3161 Datasheet(PDF) 45 Page - Maxim Integrated Products

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